# CVE-2026-20545 — MediaTek, Inc. MediaTek chipset

> As of 2026-11-04, CVE-2026-20545 is a HIGH-severity vulnerability in MediaTek, Inc. MediaTek chipset, CVSS v3.1 7.5, EPSS 0.2% (15.4th percentile). Threadlinqs Intelligence links 1 tracked threat campaign to CVE-2026-20545, most recently “Android November 2026 Security Bulletin: Over 200 Vulnerabilities Patched, Including Critical Framework RCE (CVE-2026-58868)”.

**Last updated:** 2026-11-04

## What is CVE-2026-20545?

In Modem, there is a possible out of bounds write due to a missing bounds check. This could lead to remote escalation of privilege, if a UE has connected to a rogue base station controlled by the attacker, with no additional execution privileges needed. User interaction is not needed for exploitation. Patch ID: MOLY01879158 / MOLY01774038; Issue ID: MSV-9811.

The record classifies CVE-2026-20545 under weakness class [CWE-787](https://intel.threadlinqs.com/cwe/CWE-787). Its CVSS v3 base vector states that the flaw is reachable from an adjacent network, needs no prior authentication, needs no user interaction, and has high impact on confidentiality, integrity, availability. 1 affected-product entry is recorded, across 1 vendor, listed below. The identifier was first published 2 days ago.

## Severity and exploitation probability

- **CVSS v3.1 base score:** 7.5 — HIGH (`CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H`)
- **EPSS (FIRST):** 0.2% probability of exploitation in the next 30 days, higher than 15.4% of all scored CVEs
- **CISA KEV:** Not listed in the CISA Known Exploited Vulnerabilities catalog
- **Threadlinqs priority:** 4.4/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
- **Published:** 2026-11-02, last modified 2026-11-04

## Is CVE-2026-20545 being exploited?

It currently carries a trending score of 5 in the Threadlinqs vulnerability feed.

## Affected products and versions

- **MediaTek, Inc.**: MediaTek chipset

## How to fix CVE-2026-20545

No vendor patch reference has been recorded for CVE-2026-20545 in the tracked sources. Follow the references below for a fix, and treat the products listed above as exposed until the vendor states otherwise.

## Threat activity tracking CVE-2026-20545

1 tracked threat in the Threadlinqs corpus references CVE-2026-20545, either in the campaign’s CVE list or as an indicator on the campaign record.

- [Android November 2026 Security Bulletin: Over 200 Vulnerabilities Patched, Including Critical Framework RCE (CVE-2026-58868)](https://intel.threadlinqs.com/threat/TL-2026-5206) — CRITICAL · 2026-11-04

## Sources

Enriched from CVE.org, NVD, FIRST EPSS, GitHub Security Advisories. Last verified by Threadlinqs on 2026-11-04. This product uses the NVD API but is not endorsed or certified by the NVD.

**Other references**

- [mediatek.com](https://www.mediatek.com/product-security-bulletin/November-2026)

Canonical: https://intel.threadlinqs.com/cve/CVE-2026-20545
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